Any lift can affect that ball joint. Did you get a spacer with the lift that goes on top of the pumpkin? Don't think it's needed unless you go 4 inches or more, but can't remember. Also, I have heard a couple stories of the steel bolts breaking inside the aluminum pumpkin during removal, so use PB Blaster and be careful.
I would advise buying a Mopar one, don't settle for less. Here's a Crown one of mine after 900 miles, the press fitting failed, scary as shit coming down the mountain.
New Mopar one:
Another thing you can check is the rear upper arm bushings. If you put a video camera on a small tripod pointed at them, then get in your Jeep and start it, in either drive or reverse, if you keep your left foot on the brake and right foot on the gas to torque the engine.....if there is any movement/play in those bushings you can see it on the camera. They should be really tight. Another part I would highly recommend Mopar. There are horror stories of aftermarket bushings failing nearly immediately back there. My LR bushing is aftermarket, pressed into the OEM arm, and it failed like 2000 miles later, really sucks. I'll likely upgrade the entire arm from Mopar at some point (bushings already installed) but it's like 500-700 bucks.
Good luck with it all.
